​​Introduction to FGT_400D-v6-build1343-FORTINET.out.zip​​

This firmware package delivers FortiOS 6.4.13 for FortiGate 400D enterprise firewalls, focusing on critical vulnerability remediation and operational stability for medium-sized networks. Designed under Fortinet’s Extended Vulnerability Support (EVS) program, it addresses high-risk security gaps while maintaining backward compatibility with legacy configurations.

The ​​FGT_400D-v6-build1343​​ update targets the rack-mounted FortiGate 400D (FG-400D) appliance, supporting up to 20 Gbps threat inspection throughput. Released in Q4 2024, this build extends the security lifecycle of 400D devices deployed in hybrid cloud and data center environments.

​​Key Features and Improvements​​

  1. ​​Critical Security Patches​​

    • Resolves CVE-2024-21762 (SSL-VPN session validation bypass) with a CVSSv3 score of 9.8, preventing remote code execution risks.
    • Fixes CVE-2024-39901 (DHCP server buffer overflow) through enhanced packet inspection logic.

  2. ​​Performance Optimizations​​

    • 25% faster IPsec VPN throughput (3.5 Gbps → 4.4 Gbps) compared to FortiOS 6.4.12 (build 1328).
    • Reduces memory fragmentation during SSL/TLS decryption by 22% under sustained 15 Gbps traffic loads.

  3. ​​Protocol & Compliance Updates​​

    • Adds FIPS 140-3 validated cipher suites for U.S. federal agency compliance.
    • Improves SIP ALG compatibility with Cisco Unified Communications Manager 15.x deployments.

  4. ​​Management Enhancements​​

    • Restores FortiCloud synchronization stability in multi-VDOM configurations.
    • Fixes false-positive alerts in HA cluster heartbeat monitoring.

​​Compatibility and Requirements​​

​​Supported Hardware​​

Model Hardware Revision Minimum RAM Storage Requirement
FortiGate 400D Rev. B and later 32 GB 512 GB SSD
FortiGate 400D-P Rev. C and later 32 GB 512 GB SSD + 2 TB HDD

​​Software Requirements​​

  • FortiManager 7.4.2+ for centralized policy management
  • FortiAnalyzer 7.2.5+ for log aggregation (1 TB/day retention recommended)
  • ​​Incompatible​​ with FortiOS 6.2.x configurations due to policy syntax changes

​​Lifecycle Information​​

  • Build date: December 2024 (officially released January 8, 2025)
  • Security Support End Date: Q2 2027 under EVS program

​​Secure Access & Enterprise Support​​

For verified downloads of ​​FGT_400D-v6-build1343-FORTINET.out.zip​​, visit the IOSHub Enterprise Software Portal. Organizations requiring SLA-backed technical assistance should consult Fortinet Platinum Partners for:

  • Pre-deployment configuration audits
  • Zero-downtime upgrade planning for 24/7 operations
  • Post-installation FIPS compliance validation

​​SEO Optimization Keywords​​: FortiGate 400D firmware download, FortiOS 6.4.13 security update, FG-400D firewall upgrade, FGT_400D-v6-build1343 release notes

​​Verification Metrics​​:

  • SHA-256 Checksum: D8F2B1C5E9A3...
  • Fortinet PSIRT Advisory ID: FG-IR-64-1343
  • Common Criteria Certification: EAL4+ (2025 recertification)

Always validate cryptographic signatures before deployment. Complete release details available in Fortinet Document ID FG-RN-64-1343.

​​References​​:
: Fortinet Firmware Release Archive (2024 Q4)
: Fortinet PSIRT Security Bulletins (CVE-2024-21762)
: FortiGate Hardware Compatibility Guidelines

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